copeland



(No Model.) G. P. COPELAND.

' GARBURETOR. No. 274,176. r I 1 Patented Mar.20,1883

N. FUCHS. Photo-MW WM D. C.

PATENT CHARLES r. OOPELAND,-OF BOSTON, MASSACHUSETTS, ASSIGNOR TO SOPHIA E. COPELAND, on SAME PLACE.

CARBURETOR.

SPECIFICATION forming part of Letters Patent No. 274,176, dated March 20, 1see,

Application filed January 4, 1883. (K modeLl v I i To all whom it may concern:

Be it known that 1, CHARL S F. COPELAND, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Carburetors; and I do hereby declare that the same are fully described in the following specification. and illustrated in the accompanying drawings.

This invention relates to improvements in carburetors, and it is carried out as follows, reference beinghad to the accompanying drawings, where- Figure 1 represents a plan View, and Fig. 2

1 central longitudinal section, of my improved apparatus. a

Similarletters refer to similar parts wherever they occur on the different parts of the drawlugs.

Theinvention consists ofa metallic cylinder, a, to the inside of which is cemented or other .wise secured a felt lining, b, which latter serves as a packing for the Archimedean screw 0, the outer edge-of which is screwed into and made to project slightly into the body of said felt lining b, so as to make a tight joint bet-ween the outer edge of the screw 0 and the inside of the felt lining b, the latter serving, as it were, as a female screw-thread, into which the screw 0 c is screwed, as shown in Fig. 2. The bottom of the cylinder a has secured toit a circular plate, a, on which the lower end of the screw 0 rests, as shown, said plate being provided with a perforation, a, through which the gas 3 5 and airthat are to be enriched are forced upward in a spiral manner through the screw 0, they being prevented from passing between the exterior'edge of said screw and the inside of cylinder a by the arresting packing medium I), as 0 before described. The cylinder to has an exterior flange, 0. in its lower end, to which is secured air-tight the flange d of the hollow chamber d, into which enter the ends of the air-pipe e and-gas-pipe f, the upper ends of said pipes 5 being provided with suitable hoods, c and f, respectively, to prevent any descending liquid hydrocarbon from dropping into said pipes e f. The cylinder a and chamber (1 are supported on suitable legs or bases, 9 g g, resting on the floor or ground.

Below the cylinder a, which constitutes the carburetor,'is located the tank or receptacle h for the liquid hydrocarbon It, as shown in Fig. 2. l

t' is a suitable steam or air pump, provided with a suction-pipe, 13, passing downward through the tank It and terminating near the bottom of the latter.

i is the force or delivery pipe leading from pump 6 toithe upper end of cylinder a, where it terminates as a nozzle, 0?, located above the upper end of the screw 0, as shown in Fig. 2, and by which means the liquid hydrocarbon is drawn from below and delivered at the upper end of the screw 0, and follows the spiral wall of the said screwcasitflows downwardagainst the spirally-ascendin g gas and air from the pipes of, thus presenting in a small compass a very large evaporating-surface, by which the ascending gas and air are homogeneously and rapidly enriched. 7

Should more hydrocarbon be pumped up into the upper part of cylinder at than what is taken up by the gas and air, such surplus liquid is automatically returned through the trap pipe k, leading from lower chamber, d, to the receptacle or tank h, as shown in Fig. 2.

- l is a transparent glass pane set into theside of the upper part of cylinder a, opposite to the nozzle i by means of which the proper flow of the liquid through such nozzle can be ascertained by looking through such pane or window.

at is the exit-opening in the upper end of cylinder to, through which the enriched gas and air pass to a suitable regulator, m, and (lelivery-pipe m, leading to the burners.

'e is a suitable regulator, and e a suitable back-pressure valve in the air-pipes, as usual, to prevent the escape of gas through said air ipe. p The air is forced through pipe 0 and into and up through cylinder a by means of a suitable fan-blower, as usual.

The object ot'introducing a small percentage of air in addition to the gas is to reduce the richness of the enriched gas, and by so doing I am enabled to use the same sized burners as are used when ordinary street-gas is burned, and two important resultsare thereby accomp1ish ed-namely, Iprevent the gas from smok ing and'prevent all condensation in the pipes,

which sometimes occurs when gas is very highly enriched by hydrocarbon alone.

I regulate the amount and pressure of the gas and air entering the cylinder a by means of any proper gas governor or regulator, and when the enriched vapor ascends and escapes from the upper end of the cylinder it enters a suitable governor connected therewith, as described, and which regulates its discharge into the supply-pipe for the burners.

I regulate the amount of liquid hydrocarbon entering the cylinder a by means ofany proper valve, which, when once set, allows the right amount to flow over the spiral surface of the screwc. 7V V V V V V The operation of this my improved carburetoris asfollows: The hydrocarbon is pumped by means of the pump 2' from the tank h and expelled through thenozzlei in the upper end of the cylinder ct, above the upper end of the Archimedean screw 0, and flows downward spirally on said screw inthe form of a thin sheet, and in so doing descends spirally in an opposite direction to the spirally-ascending gas and air, which are forced upward through the pipes e and f, heretobefore described, and in so doing the gas and air'are broughtin very in timate contact with a very large surface of the liquid hydrocarbon, and are thus rapidlyenriched by the volatile products of the hydrocarbon. Should more of the hydrocarbon be delivered at the upper end of the cylinder at than is taken up by the gas and air, the surplus will be automatically .conducted back again to the tank It through the trap-pipe k, 5

as described. The gas and air, after being properly mixed and enriched, as described, are forced out through the delivery-pipe m to the burners, as above described.

- By the construction and arrangement as herein shown and described several advantages over the ordinary carburetors are obtained, among which may be mentioned the arrangementofthe carbureting-chamber above the hydrocarbon-tank, which enables the lat- 5 'ter to be placed in the basement or under ground outside of the building, so as to be entirely out of theway. 7

What I wish to secure by Letters Patent and claim is-- l. The herein-described carburetor, consisting of the cylinder to, its internal felt packing, b, and Archimedean screw 0, as and for the purpose set forth.

2. In a carburetor, the lower hydrocarbon receptacle, h, and upper chamber, a, with its felt packing b and Archimedean screw c, in' combination with the pump t, pipes t" 11, air and gas pipes e f, and return trap-pipe k, as

and for the purpose set forth. 

